513738949 has 4 divisors (see below), whose sum is σ = 514049536. Its totient is φ = 513428364.

The previous prime is 513738947. The next prime is 513738959. The reversal of 513738949 is 949837315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 513738949 - 2¹ = 513738947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513738943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152799 + ... + 156124.

It is an arithmetic number, because the mean of its divisors is an integer number (128512384).

Almost surely, 2^513738949 is an apocalyptic number.

It is an amenable number.

513738949 is a deficient number, since it is larger than the sum of its proper divisors (310587).

513738949 is a wasteful number, since it uses less digits than its factorization.

513738949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310586.

The product of its digits is 816480, while the sum is 49.

The square root of 513738949 is about 22665.8101333264. The cubic root of 513738949 is about 800.9046791630.

The spelling of 513738949 in words is "five hundred thirteen million, seven hundred thirty-eight thousand, nine hundred forty-nine".